ATX SMT LANDED RWY 5 AND CLRED TO COMPANY RAMP. FAILED TO MONITOR TWR WHILE ON COMPANY RADIO AND MISSED HOLD SHORT RWY 7; CROSSED WITHOUT CLRNC. COMPANY BE02 ON APCH RWY 7 HAD TO MAKE GAR.

Narrative

AFTER SHOOTING THE VOR APCH TO RWY 7; I WAS CLRED TO LAND (AND BETTER ALIGNED WITH) RWY 5. AFTER LNDG; I WAS CLRED TO 'TAXI TO PARKING.' THIS REQUIRES XING RWY 7. AFTER BEING CLRED TO TAXI TO PARKING; I CALLED COMPANY ON COM #2 (GND WAS ON COM #1) AND SPOKE BRIEFLY WITH THEM. AFTER PARKING AND SHUTTING DOWN THE ACFT; I NOTICED (WHILE EXITING THE ACFT) A COMPANY ACFT. PERFORMING A MISSED APCH. WHEN I WALKED IN THE OPS AREA I WAS TOLD TO CALL THE TWR. THE TWR INFORMED ME OF THEIR 4-5 ATTEMPTS TO REACH ME ON GND FREQ. I APOLOGIZED AND CAME UP WITH THE ONLY LOGICAL CONCLUSION (WHICH I LATER CONFIRMED) THAT I MUST HAVE TURNED DOWN THE COM #1 VOLUME. I HAVE NO IDEA WHY I TURNED THE VOLUME DOWN (DON'T USUALLY DO THAT). I'LL DEFINITELY BE MORE CAREFUL WITH THAT IN THE FUTURE. TWR ALSO INFORMED ME THAT A COMPANY BE02 HAD 'GONE AROUND' DUE TO MY LACK OF RESPONSE ON GND FREQ. I SAW THE ACFT GAR AFTER I PARKED APPROX 2 AND ONE HALF MINS AFTER XING RWY 7. I THINK TWR ISSUED THE GAR DUE TO THE LACK OF RADAR AND THE IMC CONDITIONS.